If using Siteground as your host
You can install Joomla using the auto installer which uses Softalicious.
However, like me you may have brought ready built Joomla sites into Siteground and not been able to do a fresh install.
In this case you need to import the Joomla site into Softalicious so Siteground can recognise the installation and so you can take advantage of auto updates etc.
First open Cpanel
Then click on the Softalicious icon
Find Joomla (on front page) and click on it for more details
This opens up the following view
Then at the top click on "import"
Choose the domain you have Joomla installed under
If it is in a sub directory - enter that in 2nd box and import